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Floating-Non-Solvent Method Inducing Formation Highly Crystalline Conjugated Polymer Nanofibrils in Solution State for High-Performance Organic Transistors

Abstract

We developed a facile dip-coating printing method using a floating non-solvent (FNS) that produced highly crystalline polymer semiconductor nanofibrils. This FNS dip-coating method used a bi-phasic solution comprising a polymer semiconductor main solution on top of which was floated a non-solvent phase. We demonstrated that the non-solvent diffused into the underlying polymer-containing main solution and induced the formation of highly crystalline polymer nanofibrils over time. We tested four different floated non-solvent phases and systematically compared the miscibility of the floated phases and the underlying polymer solution as a function of their Hansen solubility parameters (HSPs). We demonstrated that the HSP difference was correlated with the degree to which the floated non-solvent and the main solution intermixed, which affected polymer crystallization, the solution state stability, and the thickness of the resulting dip-coated P3HT thin film over time. The FNS-processed dip-coated thin films were used to fabricate P3HT transistors, and the field-effect charge carrier mobilities of the devices were measured.

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Publication details

The article was received on 02 Apr 2018, accepted on 08 May 2018 and first published on 10 May 2018


Article type: Paper
DOI: 10.1039/C8TC01525B
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Floating-Non-Solvent Method Inducing Formation Highly Crystalline Conjugated Polymer Nanofibrils in Solution State for High-Performance Organic Transistors

    G. W. Kim, Y. J. Jang, M. Kim and Y. D. Park, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01525B

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